Scientists keep discovering extinct species that hardly seem possible outside of cartoons. If they were still around, we might not be! Web Urbanist shows us some of the biggest, fiercest, and weirdest of animals that are no more. For instance, the whorl shark had its own "jaw saw"!
were similar to their modern cousins despite jetting along almost 300 million years ago. While modern sharks have rows of serrated teeth ready to replace any that fall out, the whorl shark has an interesting lower jaw that looked like a circular saw, where newer teeth would push older teeth further along the line. There’s some debate about the placement of the tooth structure, but regardless of its location in the mouth or deeper in the throat, it had a startlingly unique appearance.